To fully understand the evolution of a species, we need to know:
a. the ancestral species from which it descended and what modifications have occurred over time.
b. the modifications in the organism over time.
c. the origin and diversity of the species.
d. All of the above.
A
You might also like to view...
What process allows bacteria to absorb external organic matter across the cell wall?
a. Exoenzyme b. Osmosis c. Mitosis d. Osmotrophy
Factors that influence where a specific organism can be found include
a. competition with members of their own species. b. physical factors found in the environment. c. the age of the organism. d. the number of female-to-male organisms. e. the growth rate of the population.
Gatekeeper genes and caretaker genes are both involved in cancer, but gatekeeper genes can be distinguished from caretaker genes because gatekeeper genes _____ while caretaker genes _____
1.affect the mutation rate of all genes / normally prevent chromosomal instability and aneuploidy 2.mutate to stimulate uncontrolled cell division / encode proteins that limit the rate of cell division 3.control the cell cycle / encode proteins involved in DNA repair 4.all of the choices
Which statement is NOT true about water uptake in a plant root?
A. Water enters the root from the soil by osmosis. B. Water enters the cytoplasm of the root hairs by active transport. C. Water must enter the cytoplasm of the endodermal cells to get past the Casparian strip. D. Water travels by diffusion through the cell walls of the epidermis and cortex.